To calculate tBG stats, we first score each play for the bases generated or lost and credit or debit the bases to specific players. In most cases, the bases are credited to the batter, although in some cases bases are credited or debited to base runners. This page lists the tBG scoring rules for batting and base running. Note that in some plays, multiple rules apply.
Batter bases generated scoring rules:
General rule: Any bases gained by the batter and base runners as a result of a hit, walk, HBP, error on batted ball, out, etc. are credited to the batter as follows:
- Hits are scored according the number of bases from the hit: Single = 1 base, Double = 2 bases, Triple = 3, Home Run = 4
- Advances by runners on base as a result of a plate appearance (i.e., hit, out, walk, error, etc.) are also credited to the batter. For example, runner on 2nd, batter hits single and runner scores. Batter gets 1 base for single and 2 more for the advance from 2nd to Home. Total bases credited to batter for the play: 3.
- Outs are scored as 0.
- Batter is credited with runner advances on a play even if the batter makes an out. Example: Bases loaded, batter grounds out, but the three other runners move up one base each. Batter is credited with 3 bases.
- Bases gained as a result of an error on a hit ball are credited to the batter the same as a hit. For example, a two base error where the batters ends up on 2nd is scored as 2 bases for the batter.
- Walks, Hit by Pitches, and Catcher Interference are all scored as 1 base. Base runners who move up a base as a result of the walk, hit by pitch, or catcher interference are also credited to the batter. Any additional bases gained or lost by the base runners are scored as base running plays.
- Force outs are scored as a 0 for the batter, even if the batter is safe at 1st base.
- A successful sacrifice generates a base for the batter. For example, if the batter bunts a runner from 1st to 2nd but the batter is out at 1st base, the batter is credited with 1 base.
- Unsuccessful sacrifices are scored as 0 for the batter. In such a play, the advance runner is out but batter is safe on 1st. This is the same as a force out.
- Ground into a standard double play: -1 for the batter.
- Ground into standard triple play: -2 for the batter.
- A double-play when a runner who is not forced to run but does and is thrown out is scored as 0 for the batter, and the runner is debited the bases lost. This would apply to a case where a runner tries to tag after a fly out and is thrown out.
- For uncaught 3rd strikes, bases gained by the batter and runners forced to advance a base are credited to the batter. Any additional bases gained on the play are credited to the individual base runners.
- A batter who gets a hit and is thrown out trying to stretch (a single to a double or a double to a triple or a triple to a HR) is scored a 0 for the play. For example, if a batter tries to stretch a double to a triple and gets thrown out at 3rd, he gets 2 for the double, but he gets -2 for losing 2 bases, so the net = 0. Zero bases are gained.
- If a play results in the 3rd out, single base advances are not credited to the batter except for runners who score. This rule is not applied to 3rd out plays that contain a hit (S, D, T, HR) or a 2-or 3-base play such as, B-2, BX2, B-3, BX3, B-H, BXH, 1-3, 1X3, 2-H, 2XH, 1-H, or 1XH).
Base runner bases generated scoring rules:
- Bases gained as a result of steals, balks, wild pitches, pass balls, or errors on pick-off attempts are credited to the runner. These plays do not involve the batter.
- Bases lost by caught stealing and pick-offs are debited to the runner based on the number of bases lost: Caught Stealing (CS) 2nd = -1 (runner lost 1st), CS3 = -2, CSH = -3. Pick Off (PO) 1st = -1, PO2 = -2, PO3 =-3.
- Bases lost by base runners for runner interference (RINT), passing a runner (PASS), or runner hit by batted ball (BR) are debited to the runner for the number of bases lost.
- Bases lost by a base runner when out trying to stretch to the next base on a batted ball (when not forced) are debited to the runner based on the number of bases lost (i.e., the bases he would've had if he hadn’t tried for the extra base). Plus, the batter gets credit for the base the runner safely reached. For example, runner on 1st, batter hits a single, runner safely advances to 2nd but keeps going and is thrown out advancing to 3rd: -2 for runner because he lost 2 bases. Batter is credited with 2 bases: 1 for his single and 1 for the base runner advance to 2nd.
- If a runner loses bases when he is doubled off a base as a result of a caught liner, fly ball, or pop up, the runner is debited the bases lost, and the batter gets 0 (not -1 as in standard double plays). For example, a runner who is doubled off 2nd gets a -2 for the play.
- If a runner attempts to move up on a ground ball or fly ball (and isn’t forced) and gets thrown out, the number of bases lost are debited to the runner. For example, man on 3rd, batter hits a fly ball out, runner goes and is thrown out, -3 for the runner. But if runner is forced to go and is out, no debit to the runner.